Weekly Report for Week Ending October 20, 2006
Past Weekly Reports
Agenda: There will be no meeting of the LIGO Executive Committee Monday, October 23 because of the NSF Annual Review at
Hanford
. The next meeting of the Executive Committee will be October 30, 2006.
Special Announcements: The annual review of LIGO will take place next week, 23-25 October at LHO
Weekly Report Highlights
In a message from Benno Willke, GEO announced that it would drop out of 24/7 participation in the S5 run, and concentrate instead on commissioning work. The goal would be to attain the best possible performance, especially for the time when one or more LIGO interferometers are down for enhancements after S5. During commissioning work, data will be collected in night and weekend mode. (This will be similar to the period before GEO joined S5 full time in May, during which time the data collection duty factor was 40-50%.)
A meeting of the LSC Executive Committee was held on Thursday 19 Oct. Agenda items included discussion of the GEO S5 plan that came out of the previous week's GEO meeting, a proposal to add student and postdoc delegates to the LSC Council (which got strong support), and the latest on discussions of the MOU with Virgo. The comments from that last discussion will be shared with Benoit Mours when we have the next Virgo/LIGO Directorate telecon on Friday 20 Oct.
LIGO Laboratory Administration (Lindquist)
DOCUMENT
CONTROL
CENTER
(Turner, Mak)
>From: Cleveland Mak mak_c@ligo.caltech.edu
- Continued to process the "Mega DCN" in which I constantly encountered numerous discrepancies. Several versions have been resubmitted and completion should be very soon.
- Assisted with some of the preparations for the upcoming NSF Review.
- Processing three sets of revised/new HAM drawings from Promec.
- Scanning Update - Progress continues on scanning of past years fax transmission/activity reports.
FINANCIAL SYSTEMS (Funaro, Brambila, Kaufman)
>From: "Funaro, Catherine" <Catherine.Funaro@caltech.edu>
For ACCOUNTS PAYABLE HISTORY DATA Press Here.
>From: Florence Kaufman <fkaufman>
- Prepared reports for three discretionary accounts, the Low Noise Award, the Conference account at
Hanford
, the I2U2 Award, and the MIT GRID Award. Also provided training to Annie Walden, on the preparation of these monthly reports.
- Received training on the new on-line process for requesting new account numbers and successfully used the system to obtain various new accounts required for the FY07 Award. An updated list of account numbers has been posted on the Internal Bulletin board at http://docuserv.ligo.caltech.edu/, however there will be additional changes in the next few weeks.
- Completed and sent out report for the Visitor Award and the DIA Award as of the end of September 2007.
- Responded to request from Project Accounting, for budget realignments between various LIGO accounts, which are required whenever expenditures exceed budget in Oracle at the project level.
- Worked on modifying and updating report for FY07 Operations and R&D.
- Financial reports can be found at: http://docuserv.ligo.caltech.edu/~fireport. (For passwords contact
Florence
, note, we are planning on establishing a public site for monthly reports starting with FY 2007 -pel)
PROPOSALS and REPORTS (Lindquist)
We submitted the end-of-September monthly report to the NSF.
CHANGE CONTROL/CONTINGENCY MANAGEMENT (Lindquist)
There are no open change requests.
HUMAN RESOURCES (Akutagawa)
>From: Cindy Akutagawa cindy@ligo.caltech.edu
- The next Staffing Committee meeting is scheduled for Monday, November 6
- The minutes and action items from the last Staffing Committee meeting have been posted on the SC web page
- All files for the Staffing Committee are up-to-date and posted on the SC web page
Quality/Safety (Tyler)
>From: Bill Tyler tyler@ligo.caltech.edu
Nothing significant to report this week.
LIGO
Hanford
Observatory (LHO) and Interferometer Operations (Raab)
Summary of S5 Activities at LIGO Hanford Observatory (compiled by K. Kawabe)
H2 emergency continued, but finally it's over. Now H2 is running with a good inspiral range. The duty cycle of H1 (from Thu. Oct/12 to Wed. Oct/18) was 54.0%, and no science mode at all for H2.
Range and Duty Cycle update is here.
Two-week history of H2's disaster
- First, LHO was hit by a large earthquake in the evening on Sat. 7/Oct. However, at this time both of the IFO were able to get back to the science mode.
- In the early morning on Tuesday 10/Oct, just before the Tuesday maintainance, after one lock loss H2 developed a big excess noise, and the binary range dropped to 2Mpc. This excess noise comprised a broad hump and a big peak at 85Hz.
- In parallel to this problem, unfortunately one of H2 computers silently began failing. It took roughly three days before we were able to lock H2 again.
- On Sat. 14/Oct, ETMY suspension modes were found to be off. Certain modes shifted in frequency, and the Q values got much worse.
- By Mon. 16/Oct, all of the subsystems (LSC, ASC, SUS, ISS, FSS, IOO) have been looked at, and nothing really obvious was found except ETMY suspention modes. Electronics and computers were also tested rigorously and found to be OK. With this knowledge, we "burped" (i.e. leaked the vacuum up to 1 torr) MX. Immediately we saw a large jump in the ETMY's alignment.
- "Burping" made two distinct things for H2 noise. First, 85Hz peak disappeared. Second, the broad noise hump got larger. Also the Q of ETMY suspension modes were found to be worse than before.
- By tracking the alignment slider, ASC control signals and OSEM outputs, it was made clear that the large earthquake did something to ETMY which resulted in the large change of ETMY alignment relative to the cage, but the cage itself didn't move, and we have been fighting against this manually (by slider) and automatically (by WFS). This initial change has been very slowly relaxed over ten days and eventually settled to some different position than pre-earthquake era. The first "burping" restored ETMY to the position closer to the original, but it was still different.
- Since it was clear that 85Hz noise was gone with burping, that the ETMY was related to the increased broad noise hump, that the ETMY was still in a horrible state, and that we didn't have much options other than to fully open the MX chamber to have a look, we decided to do another round of burp. This time it worked. Suspension modes got back to where they ought to with decent Q, and H2's noise level got back to 6+ Mpc. However, the origin of the excess noise is still unknown, and we still don't understand why H2 didn't show the excess noise immediately after the big earthquake.
Other things
LIGO
Livingston
Observatory (LLO) and Interferometer Operations (Zucker)
LIGO computing and network security (Roddy)
Reported under General Computing, see below.
General computing and LDAS admin (Giardina)
Reported under General Computing, see below
Reported under LDAS System Administration, see below
Data analysis & computing (Yakushin)
Storage/Condor/LDAS admin: Reported under LDAS System Administration, see below
Data analysis: Reported under Data Analysis activities, see below
Mechanical and Optical Systems (Coyne)
See Advanced LIGO
Controls and Data Systems (Bork)
See Advanced LIGO
40-Meter Interferometer (Weinstein)
- The 40m Technical Advisory Committee (40m TAC) met by telecon this morning (10/19/06). Rana led the discussion, reviewing recent progress and future near-term and long-term plans. Details are in his slides and the Wiki.
- The Honorable Jack McConnell, First Minister of Scotland, visited the 40m on Monday, with an entourage from the British Consulate. Special guests included Jim Hough and Shiela Rowen of U Glasgow / LIGO.
- DC detection:
- Valera, Rana and Sam put the IFO into a bright Michelson, worked on the alignment using the BS and ITMs, and eventually saw nice symmetric fringes on the OMC, of about 75% of the input power. They then used the REFL PD to dither lock the cavity, using a 12 kHz dither and the SRS lock in amplifier. Rob found the OMC transmitted beam and got it onto a camera; it looks round.
- Alex has been working on getting all of the software tools working with the new DC readout controls. The controls run at 32KHz, above our previous highest rep rates of 16KHz, and are not VME and reflected memory network based, so some Framebuilder and DTT codes still need modifications to support this. Alex has installed a new version of the software on the controls computer (c1omc). He also updated dtt (to work with 32KHz data rate?) and moved the test point manager to another machine.
- Rich finished testing on the OMC Length Driver Chassis. All functions are verified to be within design specifications. He has also finished testing on the tip/tilt Piezo driver chassis used to drive the Piezo Jena piezo steering units.
- Ben has tested the QPD Whitening Interface board, and it is now installed in its box, and the front and back panels are on. It powers up fine, and will be installed soon.
- Rob has been refining the DC readout EPICS controls screens and learning how to use them.
- Bram, Bob and Ben are wiring up the low voltage and high voltage power supplies for the DC readout controls electronics.
- Bottom line: we should have all the hardware and software in place, and begin commissioning the new DC readout controls, next week.
- Vacuum squeezing:
- Go subtracted the electric noise from the shot noise and squeezed noise, and found about 5-6 dB of squeezing and about 12-13 dB of anti-squeezing when the squeeze angle was scanned. The imbalance between the two levels is mostly due to the detection efficiency.
- The in-vac picomotor translation stage and mirror mount for the squeezer experiment is not working. Go has designed a new propeller-type mirror mount that can be rotated by the picomotor. We will vent sometime in the future to fix this system.
- IFO commissioning, Electronics, controls, computers:
- Rana has been adjusting the MC mirrors to find some compromise between centering the MC resonant beam on the optics and getting the transmitted beam through the faraday isolator without clipping. Ongoing work.
- Rana found large offsets on the input MC WFS DC outputs, so he reset the appropriate database entries, recented the beams, restarted the system, adjusted the gain, and all seems well.
- Rob re-established lock of the dual-recycled Michelson. He sees clear evidence for clipping, maybe in the Faraday isolator.
- Kirk, with help from Rob, Rana, Sam and Bram, replaced the makeshift Pockels cell mounts on the Mach Zehnder with tip/tilt stages mounted on anodised aluminium mounts. They decided to take out the 29MHz modulator altogether, leaving the 33MHz PM in one arm of the MZ and the 166MHz PM in the other. The 33MHz and 29MHz signals are now summed electronically, and fed to the 33MHz modulator. Kirk realigned everything and adjusted the servo loop offset to get exactly onto the bright fringe, minimizing AM. The fringe visibility went way up, the error signal is now much more stable, and there's 5% more power into the MC.
- Steve and Kirk noticed that the laser power was dropping, as was the power transmitted through the input mode cleaner. Rob found the problem: the c1psl processor was down, for some unknown reason. He rebooted it and relocked everything, but problems with dataviewer (related to the DC readout electronics) prevented him from verifying that the PSL was restored to the right state.
Thermal Noise Interferometer (Black)
We now appear to have a working inductive heater and an effective
procedure for installing the monolithic ring dampers on the TNI
optics. Two ring dampers were installed on SAC's output mirror, and
then the mirror was installed in the interferometer and suspended.
Akira is working on alignment.
LASTI (Ottaway)
Quad Thermal Tests
Brett concluded his test on the thermal distortion of the Quad
Prototype. The results can be understood in terms of a simple 1D heat
equation model.
ISI
The transfer functions of the ISI continue to improve as we eliminate
errors. The significant asymmetry of the corner transfer functions was
traced to the compliance of the dial indicator position sensors. Once
these were removed the transfer functions improved significantly.
HAM SAS
A quick calculation showed that the suspension load of the most
demanding HAM table in Advanced LIGO (HAM 2) in a stable recycling
geometry can be simulated by putting a mass of 270 Kg elevated off the
table surface by 0.45m. We are currently trying to a solution to do
this cleanly, quickly and easily.
CIT Science Group (Weinstein)
____________________________________________
Patrick Sutton [psutton@ligo.caltech.edu]
This week I've been busy with development work on the xpipeline
coherent analysis package, and collaborating with Antony Searle on
its Bayesian extension for burst detection. I'm currently marking up
the LIGO-AURIGA paper.
____________________________________________
Shourov Keith Chatterji [shourov@ligo.caltech.edu]
* I reported to the burst group on the status of S5 Q
Pipeline search. I am currently tuning a veto based
on the H1-H2 null stream. Trigger production is
nearly complete for time lagged injection studies of
Gaussians, sinusoidal Gaussians, and white noise
bursts.
http://ldas-jobs.ligo.caltech.edu/~shourov/q/documentation/2006OCT17.html
* Reported on the glitch group investigations on the
weekly S5 run call.
http://ldas-jobs.ligo.caltech.edu/~shourov/reports/glitch/WeeklyDC_20061008-
20061015/
* I am also investigating trigger properties from recent
high noise H2 data. The triggers appear to be very
consistent with those expected from stationary noise.
http://ldas-jobs.ligo.caltech.edu/~shourov/reports/20061018_H2_problems/
____________________________________________
John Zweizig [jzweizig@ligo.caltech.edu]
This week I have been working mostly on dmt issues.
- Chased down a bug in TimeMon that caused it to take down an entire
online node at unpredictable times. I found and repaired one problem
that will hopefully make it work better.
- Started to resolve issues in the new lscsoft dmt release.
- Some progress in data quality studies.
____________________________________________
Kent Blackburn [kent@ligo.caltech.edu]
TclGlobus:
I'm still working on adding a list to keep track the number of
open and close sockets to prevent the Tcl application to close
the socket twice. This is related to LDAS managerAPI core dumps.
OSG:
Provided Michael Samidi with a globusrun script to find and
remove the gwfs in a Pegasus partition.
Developed an OSG Twiki page on ITB Documentation Best Practices
with a sub-committee of the ITB.
Completed running full-blown HIPE workflow at UCSD in bundle
mode. This workflow has now run to completion with at two OSG
sites, PSU and UCSD.
Completed first version of a DASWG OSG-LIGO web page documenting
recent and on-going LIGO OSG development activities.
Attended DASWG , Storage-TG, ITB and VDS telecoms.
Still testing LIGO workflow planner with N arbitrary partitions
and the cleanup of intermediate GWF files. Currently, I'm using
LIGO_CIT_ITB cluster to run the test and it's not completed all
the way through. I just discovered there is a bug in my code
related to the number of partitions set in the preference menu.
This is the last problem. After fixing this, I'll run this at
several OSG production cluster.
OSG Integration TestBed:
Determined that the gridmap update script employed in 0SG release
0.3.7 is no longer installed by default in OSG release 0.5.1.
Consulting with the OSG ITB team on the work around.
OSG Resource Manager:
Reviewed and approved the Caltech Statement of Work (SOW). Also
reviewed six other SOWs in development, identifying several issues
with content of these.
Security/Certificate Working Group Formed:
Held first weekly meeting of the LSC Computer Committee's newly
formed Security/Certificate Working Group. This group is reviewing
security, certificate issuing, account management for the LSC as
a whole. Representation consists of LIGO, UWM and PSU security and
certificate experts. Plan to meet weekly.
____________________________________________
Xavier Siemens [siemens@caltech.edu]
- Worked on hierarchical einstein@home search. Looked at a
few kinds of searches and their sensitivities.
- Found all missing h(t) from the beginning of the S5 run up
to May 27th to produce DQ flags for Keith Riles (most of it
is filter transient times at start and end of science segments)
- Prepared and gave NSF talk dry run
- Prepared LIGO time domain calibration method presentation
for joint LIGO/GEO/VIRGO meeting on calibration in Annecy
(presentation to be given on Friday the 20th -- remotely from
California)
- Worked on S4 cosmic string burst search paper (writing)
- With Kipp Cannon, analysed the results of four more cosmic
string runs to determine the effect of trigger overlap on the
rate of foreground triggers. Needed to re-run two of them b/c
of problems on nemo.
- Continued to read MQM papers for work with Kip Thorne's group
- Worked some more with Eiichi Hirose on TD calibration validation
- Spent time with Pinkesh thinking about re-sampling techniques for
pulsar searches
____________________________________________
Gregory Mendell [gmendell@ligo-wa.caltech.edu]
Progress on automating the fscan spectrogram code with
Rejean Dupuis is reported in this elog:
http://ilog.ligo-wa.caltech.edu/ilog/pub/ilog.cgi?group=detector&date_to_vie
w=10/13/2006&anchor_to_scroll_to=2006:10:13:21:38:54-gmendell
__________
Duncan Brown [dbrown@ligo.caltech.edu]
- Worked on PTF code with Diego
- Worked with Curt on LISA SMBH challenge
- Worked on finishing LIGO-IMRI paper
- Learned how to manually center domains and re-interpolate numerical
relativity data
- Travelled up to LHO for a week of shifts
____________________________________________
Igor Yakushin [igor@ligo-la.caltech.edu]
Working on generating (hopefully) final set of production and simulation
triggers for the coherent waveburst analysis on S4-only, S4 LIGO-GEO, S5a
LIGO-only, S5b LIGO-only, S5b LIGO-GEO data for presenting the results at
the LSC and GWDAW-11.
Laboratory Computing (Anderson)
-----------------------------
LDAS Software Systems (Maros)
-----------------------------
The 64 bit version of Globus Toolkit 4.0.3 has been successfully
compiled and installed on ldas-dev and sunopteron. TclGlobus has also
been installed on ldas-dev. The build of TclGlobus failed on sunopteron
as teTeX has not been successfully built for this configuration. The
building of TclGlobus is being modified to skip building of the pdf
version of the files when pdflatex is not available. When starting ldas
on sunopteron, the diskcacheAPI terminates shortly after startup.
Examining the core dump that resulted, it appears that C++ exceptions
are not being caught. More investigation to understand the problem needs
to be done. Also on the sunopteron, the metadataAPI terminates soon
after startup. This too is being investigated.
Several changes to limit duplicate e-mail messages have been made to the
cntmonAPI. As part of the changes, the new resource variable
::MAX_EMAILS_SENT_HOUR has been added.
System tests for ldas were done with versions 1.8.333 and 1.8.341. All
tests passed except for lsync. Support for catching SIGHUP, SIGTERM, and
SIGINT and writing out the cache file before terminating the lsync
program has been added. It has been shown with a nightly build that this
solves the lsync issue. The lsync system test is expected to pass next
time the system tests are run.
LDAS System Administration (
Anderson
)
Caltech
-------
(Dan Kozak)
* Continued to keep an eye on archiving (particularly in /home) but it
hasn't gotten stuck/behind this week.
* Report on metadata fragmentation and stripe size questions here:
http://www.ligo.caltech.edu/~dkozak/mm_stripe.html.
* Converted /scratch to use EFI. Learned about limits of QFS
interoperability between Sparc and x86.
* Sent extra blank tape back to LHO (it was accidentally sent to us with
the weekly shippment).
* Finally sent 3 tapes back to LHO to fill in a hole in A4 data (the copy
1 tapes at LHO were damaged). This data is being verified at LHO now.
* Helped with a few things related to bringing LLO back up after power
outage(s).
* Tracked down disk space hogs at CIT;released some of Duncan's files.
* Identified tapes for shelf storage at LHO.
* Cleared off my old desktop machine for return to Larry.
* Sent followup to sam-managers with Stuart's correct answer about the
runaway syslog problem.
* Removed superflous vdt-rotate-logs cron entry on ldas-grid.
* Changed LHO's cronjob that archives old samfsdumps to /usr2 to only
retain 10 days of data in /usr2 (down from 14).
* Deleted LHO /archive/frames/S3/burst as per Igor's instructions.
* Working on getting data moving smoothly from LLO to CIT via LDR after
power outage.
(Phil Ehrens)
* Configured Apache for use by LDAS developers on sunopteron and linuxopteron.
* Configured GC interfaces on linuxopteron and sunopteron.
* Configured sendmail on LDAS at MIT to support sending of mail
via local smarthost.
* Wrote cgi frontend, middle layer, and backend for the LIGO
Visitor Application Form.
* Supported LDAS and TclGlobus developers with Tcl expertise.
(Erik Espinoza)
* Upgraded CIT Cluster to Condor 6.8.2.
* Tested various configurations for gsl/gsl-devel and fftw/fftw-devel.
* Submitted bug report to condor-support.
* Sync'd up kickstart.
* Rebooted ldas-grid/ldas-pcdev1 due to incorrect kernel issue.
* Tested x86_64 Condor 6.8.2 on frog.
* Requested DNS wildcards for LDAS cluster email at LHO.
(Stuart Anderson)
* Upgraded Condor and LSCSOFT on the LDAS-CIT and LDAS-MIT clusters.
We now are able to run and checkpoint 64-bit applications.
* Re-synchronized the exact set of RPM's installed on the cluster nodes
at LDAS-CIT and LDAS-MIT.
MIT
---
(Fred Donovan)
* pcdev-1.mit.edu was consistently hanging on EK's jobs.
backed out updates ipython and libpng-devel; problem resolved.
EK does not use either in the code he was running (!?)
* Facilities issues: cluster room a/c beeping, reset, called facilities
to schedule a look-see; facilities also reconfiguring cluster room
condensate pipe
* Got my grid and E@H certificates.
* pcraid5 - contacted asa again: it does start up for 5-8 seconds: but must
be fully power cycled to repeat. May try replacing mainboard.
Livingston
----------
(Igor Yakushin)
* Discovered that the discrepancy between the Injection segments returned by
LSCsegFind and segpagegen is due to the fact that the former uses an extra
constraint active=1. Adding this constraint to segpagegen seems to fix the
problem. I have not patched the production scripts yet.
* On Monday we had two power outages. LDAS recovered fine: about 15 nodes
required fsck on /usr1, other than that there were no problems.
(Dwayne Giardina)
* Ejected tapes for shipment to CIT, imported and labeled replacements.
* Replaced hda in node42.
* Replaced bad memory in node186.
* Various tasks associated with bringing LDAS back online after the power
outage, including checking for corrupted frame files near the outage.
* Helped Lisa with fb0 disk array problems after power outage.
Hanford
-------
(Greg Mendell)
* We have caught up with RDS generation at LLO, after this week's power
failure. RDS generation will catch up shortly at LHO, after last night's
T3 RAID reset.
* Scripts that monitor raw, trend, and RDS data for time gaps have been
updated with the options to output segment lists for generating
data-quality flags that indicate missing data, and also to intersect
these gaps with output from LSCsegFind. This allows monitoring of data
that exists only during locked or science mode times, and monitoring of
h(t) has been set up at LHO and LLO. The code is available from CVS:
CVS/Root=pserver:anonymous@gravity.phys.uwm.edu:2402/usr/local/cvs/lscsoft;
CVS/Repository=dsorun/contrib/gapchecker.
(Ben Johnson)
* Installed the multi-host LDRdataFindServer at LLO.
* Replaced failed disk in 3511-5.
* t3-20 reset itself on the morning of Oct. 19 2006, but is now
currently working.
* I have been working on getting all h(t) data to LHO, as well as
BurstMDC data to the site. Currently have a disk space shortage on the
nodes (can't fit an entire RDS_R_L1) directory on most nodes anymore.
* Replaced motherboards in several nodes. But they are not up yet since
kickstart is failing to fully install everything the nodes need to boot
properly.
* Trying to get SAM-FS filesystems to work under a local zone on
samtest. All attempts so far have failed.
General Computing (Wallace)
MIT:
(Fred)
-EK code hangs both nova and pcdev-1 reinstalled os
nova FC 4 didn't take (numa issues) FC 5 seems fine
-more user setups: pc box; solaris, laptop tuning
-consolidating backups: lancelot:/raid/home,
gravity:/data3, and nova (was and will be)
nova:/data1 to tingtage ( 2TB 4 500G RAID 0);
250/500GB AIT drive attached;
rysnc via cron via ssh with nightly mailing to fjd;
-more Dovecot work (imap)
-spec out matlab desktop/server (Athlon64 v Opteron),
-some issues matlib lic. now ok
we have license for Matlab 2006Rb through 8/2007
-tested ~5 asa 1 CPU xeon rackmounts in pump room, reseated ram, etc. -
none ! will post - set aside for spares
Livingston:
(Dwayne)
- additions/changes to database(s) on new MySQL server
- windows updates on kantech server
- connected new fiber bundle from Comm Room to the patch panel in CUR
- replaced CPU in a Dell workstation
- continued training our spam filter
- other usual user requests and support
(Shannon)
-Set up a Certificate Authority for LLO. Needed for some SSL web pages
and also some VPNs that I have set up in the last few weeks. Discussion
is still ongoing as to better coordinating this with other sites. The
CA will also allow roll out of a user level VPN for LLO.
-Secured a "security wiki" with SSL. Will later require user certs for
authentication to view the wiki.
-More IDS changes at CIT and LHO. Web interface now secured via SSL.
-Still coordinating network changes with LSU... Hopefully BGP will be
going by this afternoon assuming LSU will be ready.
-Began testing equipment for the grand opening. Successfully streamed
an mpeg4 audio and video stream from the auditorium. Next is to get the
computers and projectors set up and configured. Seems to work OK, audio
is not the greatest though. Will have to do more testing once the
computers are set up.
-Ordered various fibers for the upcoming core switch move. Will have
to plan this during some acceptable downtime, possibly during a
maintenance period.
Hanford:
(Christine)
- Finished setting up two new laptops for users. Installed the
Primavera and Prism software on one of them.
- Installed a floppy drive in a new desktop.
- Started cleaning out my server room again in preparation for
installing the new servers, disk unit and tape library.
- Worked with Larry on setting up a new wireless AP and presentation
laptop for the NSF review.
- Waiting on one final quote for the Cisco 6500 so I can put in the
purchase request.
CIT:
(Veronica)
- LIGO: Ongoing support of the NSF Review; postings of the dry run
talks/background materials; working out the logistics of the selectively
restricted access to various presentations. Updates of other LIGO-related
sites. Keep working on the LAAC website/databases.
- LSC: Updates of the database of technical papers. Support of the
website for the LSC meeting.
- CaJAGWR: Taped/compressed/posted for streaming the video of Lars
Bildsten's talk. Website updates.
- Project Science: Posted the presentations of the last workshop.
(Mike)
-Worked on a MAC loaded with Paralles running XP & Fedora. Getting this
ready for the conference.
-Worked on an many issues with the mail server through out the week.
-Moved the W/B control room to its new location.
-Finished up loading a SUN workstation for the control room.
-Worked the Spam Filters. I spent most of the morning on this.
-Other user support, plus various sysadmin tasks.
(Larry)
-Wrapped up reconciliation for the P-card. Working on license renewals
for the Ansys and Matlab licenses. The ansys renewal should be done in
the next few days.
-Assisted one of the Astronomy groups retrieve some data off of a tape
they were having problems with.
-Restored a number of old files for different people.
-Worked with Mike in getting equipment and furniture moved. Most in
preparation for a variety of office moves.
-Assisted PMA in a couple of equipment moves in preparation for the new
offices for Rana and company.
-Worked on the MAC to be used for presentations. It is now at Hanford
being tested.
-Replaced one of the AP units that had just quit functioning with one of
the new units I had been testing. So, far it has been working well.
Also, modified the scripts to work with the new units. A few more
modifications and it should be ready for regular use.
-Assisted a couple of users with printing issues. Mainly, getting things
out in a format that they could use for their reports.
-Worked the spam filters and related s/w. The machines are just being
pushed to their limits and need to be upgraded, which is in the plans
for the near future.
-Working with Christine on a variety of items. Presently, testing a
upgrade to the wireless in the conference room.
-Assisted the DCC with a number of items and worked with Veronica on a
couple of web related items.
-Assisted a couple of users with their accounts. Also, setup a couple of
new e-mail aliases for different groups.
Advanced LIGO and Supporting R&D (Shoemaker)
Advanced LIGO Systems
modeling and simulation (Hiro Yamamoto)
-----------------------------------------------------------
e2e weekly meeting
----------------------------
Valerio explained the HAM-SAM modeling. He also explained some missing interaction term between HAM-SAS module and the triple pendulum module which could explain the difference between the result of the monolithic model based on Maple code and the result using two separate statespace modules (hybrid), HAM-SAS and triple pendulum.
Sany and his students reported new e2e results based on the hybrid model. Some discrepancies between two models, monolithic and hybrid, observed before disappeared in the high frequency region ( f > 3 Hz ), but the predictions about the effect of pendulum resonances at f ~ 1 Hz do not agree yet.
Osamu pointed out that implementation of local dumpling in the triple pendulum system (or artificially using low Q) is crucial to asses physically meaningful predictions about the effect from the pendulum resonances.
Vacuum injection to Optickle (Osamu)
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No report for e2e, but I was trying to implement vacuum noise from
dark port on the Optickle which was written by Matt as a new frequency
domain simulation for LIGO type interferometer with radiation pressure
noise, but not vacuum injection. I got the same vacuum noise on Optickle
as Thomas's simulation tool using amplitude modulation and phase
modulation with very small power. I think the similar technique can be
used on e2e to implement vacuum noise.
Fast simulation of Dual Recycled Michelson Cavity (Hiro, Keiko)
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Still working on FP cavity to formulate the linear approximation-based fast cavity simulation.
The modal model field has been written in the mathematica code using
proper approximations. The bugs were removed. This expression can find
the new field in the cavity at the time (t+2*N*tau), when the cavity
field at time t and the external field are given (tau is a time step (l/
c)). The next step is to compare with the e2e result which contains no
approximation. The calculation should agree with the e2e result.
Mechanical Simulation for advanced LIGO (Sany and SLU team)
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We combined the triple suspension model (based on Mark Barton?s state space matrix) and the HAM-SAS horizontal model (based on Valerio Boschi?s state space matrix). We injected white noise into the X (normal to the optic surface) and Yaw input ports at the base of the HAM-SAS model feeding back the reaction from the suspension via the suspension point, and computed the optic?s X and Yaw motions. The triple suspension was locally damped with actuation force fed back to the optics via a simple filter (a zero at dc and a pole at 10 Hz). With the local damping control on or off, the system showed a stable response (as opposed to the fact that the system was unstable when the local damping was on two weeks ago for some unknown reason).
(Kinchen)
This week I ran our e2e model of triple suspension and Inverted pendulum table combined? under the free hanging condition with the reaction feedback via the suspension point, and compared their graphs to those provided by Valerio Boschi. My objective was to ensure that our e2e implementation of the model is an accurate representation of Valerio's maple model. I found the graphs with no actuation force to match with Valerio's between 0.1 to 9.0 Hz. We are proceeding with the tuning and analysis of this model.
ALFI : e2e front end (Melody)
-------------------------------------------------
Continuing in the graphical implemention for the new User Defined Primitive.
from Dennis Coyne
See also:
AdL Systems wiki web page
AdL Systems email archives
Records Of Decisions or Agreements (RODA) status web page
o Signed RODA issued (E060308-00) to document a change in the baseline conceptual design for the high power laser. The front end laser is changed from an injection-locked ring laser to a master oscillator-power amplifier (MOPA) arrangement. The high power amplification is still an injection-locked, high power oscillator.
o Motivated by the need to define payload mass properties for the HAM-SAS prototype test, I started a revision of the mass properties of the HAM layouts for the baseline, marginally-stable, recycling cavity as well as the alternative stable recycling cavity. Working out the ballast/balance mass positions with Dave Ottaway to replicate the high position (relative to the geometric anti-spring filters) of the mass loading at the suspension points.
o Approved 5 Document Change Notices (DCNs) for the ETM quadruple suspension noise prototype being built by the UK. A list and status of the ETM quadruple pendulum DCNs can be found here.
o Performed simple thermal analysis (T060243-00) of the controls quadruple suspension, in-vacuum heating test performed recently in the LASTI facility. Questions remain – need to perform a ring heater test with the noise prototype next year to properly represent the complex radiative heat transfer.
Vacuum Compatibility
Vacuum Preparation & Residual Gas Assay (RGA)
See also the Vacuum Bake Lab
Bob Taylor
o I am baking the heater coil and fixture that Lee Cardenas gave me last Friday.
o I have received requests for Vacuum bake jobs from Luke Williams for the Raraday Rotator, Nergis for the parts used in the Radiation pressure experimentat LASTI and from Doug Cook for a high priority bake job for Hanford
[D. Coyne: Doug’s bake components are earthquake stops with glass tips to prevent charge transfer. These were thought to be likely needed for the 2km ETM that got stuck from the earthquake. However, the ETM2k is now back in science mode.]
o I have prepared the ovens and have the supplies on hand for these jobs.
o I have finished the OSEMs for the UK and will ship them tomorrow.
o I have contacted Mark Anderson at JPL and he will be here today with a FTIR kit for Riccardo's parts. I will get those in one of the ovens as soon as Doug's stuff come out of one of the ovens.
[D. Coyne: Riccardo’s parts are sample HAM-SAS parts cleaned by Soldi in Italy, a subcontractor to Galli & Morelli. We plan an FTIR test by JPL followed by an RGA measurement. The parts will be shipped to Italy for cross-check on the FTIR system being used for QA of the cleaned parts.]
High-Irradiance, Contamination-Exposure Cavities
Lee Cardenas, Liyuan Zhang
OTF Lab. (W. Bridge) No Change
Cavity # 1
The NEW SAMPLE MIT UV-ADHESIVE, NOA 76 is under test.
The cavity is locked. We were taking measurements
every day for absorption and ring down. So far, the cavity
shows no sign of contamination.
Scatter/Absorption Test Measurement prototype In progress
The new scattering test has been completed on the 4 ITM04 mirror.
Starting a scattering measurements on the 1.00 inch sample mirror
As before, All these test in order to have better understanding of the
scattering and absorption of the mirror. The results are different each time.
OTF Lab at Lauritsen ROOM 38
Cavity #3
The new sample, stepper motor is in the cavity.
The cavity is locked. We were taking measurements and we'll continue
taking every day for absorption and ring down.
Cavity #2 change
We are going to re-start the assembly, optical as well as mechanical.
All these are in progress.
Suspension tasks:(Lee/Ken)
The assembly of the suspension table still in progress. Modifications are being drawn.
Misc..tasks (Lee/Mike) In progress
* We have received the new Mephisto Mopa 1watt laser from Linos Photonics, Inc.
* It is already installed in place and I have run some test to make sure that the laser is in a good working condition, Which it is so far. I Took some power measurements at different current setting and recorded its results for later use.
* We are going to need a new optical table ~24"x24"x1/2" thick, which its order is in progress. We want to make sure that this is the right size needed it.
Ring Heater (Lee/Phil)
* We have a fused silica rod ~6mm with windings of a Nickel Chrome wire, Bob Taylor is going to bake the entire fixture (wire, rod, feed-through) by this Monday. Later, it will be tested for contamination.
Seismic Isolation
BSC seismic isolation testing
Requests for quotes have been sent to three companies interested in cleaning and air baking the (9) large parts which are too big to fit into the cleaning ovens at Caltech and the sites.
A request for quote has been sent to the crating company to build the crates for shipping.
Rich and Fabrice found the dial indicators to be a source of extra compliance between the stages. After disconnecting the dial indicators the transfer functions of the three corners were much closer.
Single stage HAM Procurement
Meeting notes from the RFP telecon were sent to each of the bidders along with replies to numerous questions that have come up since. Bids are due October 24th.
From: Dennis Coyne coyne@ligo.caltech.edu
Ric, Alberto, Virginio, Dennis, Ben, Dave, Valerio
1) fabrication status
everything is disassembled -- some parts in cleaning
Some delay with the large oven. Now they are working full time on it (but last week they were on a cryostat for INFN that they started that while waiting for delivery of our metal sheets); We lost 3 or 4 days.
The assembly should be done by end of the week, followed by re-cleaning and commissioning.
The small oven is working and I can start receiving small parts to process this week
Clean room: cleaned -- has clean storage shelving now -- 'horses" & A-frame completed & cleaned -- ready for assembly to start next week -- will start with the GAS filters
Ric ordered 3 noise cancelation headphones for use in the noisy cleanroom
Coils -- liquid polyimide resin stuck in shipment for a week, but the dry ice lasted, so still good (must be maintained at low temperature to prevent self polymerization)
Virginio must provide number of windings -- will likely wind in a within a week (should be ready
FTIR: everything ready (except for a longer tube -- should have in 2 days)
Elevator design evolved again -- drawings posted on Ric's web page
Virginio plans to travel to
Italy
11/11 for work at G&M (and Valerio's mid-term exam)
we are still trying to ship mid-Nov (although we have just experienced about 3-4 days of slip)
Ric will stay for 6-7 wks till the unit ships
Ric will not be able to attend the meeting next week (Chiara should be available)
2) LASTI test plan
Ric confirmed that the HAM-SAS assembly will be shipped to LASTI in the Adv. LIGO configuration (i.e. with the lower optics table height) -- this permits the MC triple suspension to be placed over a much lower portion of the table (good)
Dennis sent a preliminary (and as yet incomplete) update to HAM payload mass properties & layout document to Dave for discussion
Dennis is convinced that air bearings under the support structure are not necessary for ~1 mrad and 1 mm vertical re-alignment -- working on completing an analysis & report to prove this
3) electronics
finished Guralp interface chasis
will move on to LVDT interface chasis
small kapton connectors ordered -- will ship from Caltech to G&M soon
4) simulation
Valerio still working on back-reaction effect -- Virginio & Valerio have worked out the mathematics
From: Ben Abbott <abbott_b@ligo.caltech.edu>
40m OMC effort:
The QPD Whitening Interface board is now installed in its box, and the front and back panels are on. It powers up fine, and I should bring it over sometime today to the 40m.
I worked with Bram yesterday to better layout and define the DC power distribution for the OMC electronics. They should be complete in the next few days.
Seismic:
HAM-SAS
I have finished laying out the Guralp Interface PCB. It is ready to go to the boardhouse whenever I get time to send all the PCBs out.
I have started the re-design of the LVDT Driver from
Italy
. So far, I'm getting a list of the parts together, and making sure that they are all available.
I found out that the Accuglass quote is within normal parameters for the in-vac cables, so I'll be ordering them soon.
Riccardo's small kapton circuit boards are being made at Hughes Circuits inc.They should be here in a few days, at which time, I will give them to
Cleveland
for shipping to
Italy
with some other stuff.
ISI
The new GS-13 boards have arrived from PCB Express, and they are being stuffed with pins and attached to the 26" cables that were made in the back shop last week.
Suspensions
From: Janeen Romie romie_j@ligo.caltech.edu
*Advanced LIGO*
Getting more involved with the OMC and will hold a suspensions OMC meeting tomorrow with Calum, Chris, Norna & Vuk and others.
I have a progress update meeting with Carol and Dwight tomorrow morning in which we will discuss, among other things, the need to rework the schedule to reflect the real work being done so we can track it and it's impact on related work.
From: Ken Mailand kmailand@ligo.caltech.edu
The CES shop has completing the last arm section, and is modifying the fixture rotator assembly X-axis plate to match the arm.
I'm working on the lift assembly frame for the suspension.
Core Optics
From: Bill Kells kells@ligo.caltech.edu
1. Parameteric Instability. The emphasis in this is to complete a summary
of the status of various aspects of this phenomenon, and distill them into a
clear overview presentation for the upcoming "optics summit". This will entail
actually a lot of new work: 1. Running further model "cases", in particular with
respect to the effect of recycling cavity finite Gouy phase on PI thresholds; and 2.
completing a [LIGO T] note detailing the formula for FFT simulated PI calculations
(cf. LIGO T060207), and discussing its legitimacy.
2. LIGO TM mirror surface scatter loss. I am trying for completion of analysis of
our recent OTF scatter measurements for presentation at the "optics" summit.
We are attempting to squeeze in a few more, hopefully decisive, measurements
before then. There is a lot of data, which I have a model trying to keep up with !
In any case we are definitely evolving new insight into what fabrication characterization
measurements will be required for AdLIGO. What needs to be done differentlly than was
used in initial LIGO.
3. Several newly "released" inspiral data analysis task force papers require now immediate
final review: I put on my review committee hat (much neglected of late).
From: Helena Armandula ahelena@ligo.caltech.edu
Adv. LIGO SUS
Met with Jim and Sheila and discussed details on LASTI's ear bonding on masses.
Scheduled to discuss further details on Ian Wilmut's design meeting next Tuesday.
Adv. LIGO COC
Working with Mike Gerfen on the requirements of a smaller ERGO arm to be used to move Adv. LIGO optics through the optical characterization.
Started vacuum testing of Norlan optical adhesive as possible back-up for Vacseal.
Schedule visit to Stanford to measure optical absorption on mirror coated with First Contact for a month.
Working with Mike Gerfen on the design of a mock-up lower structure to test mirror cleaning procedures "in-situ".
Auxiliary Optics
PO
MIRROR & PO TELESCOPE CDR
I completed the PO Mirror & PO Telescope, and OMMT CDR document, T060360-00. It will be distributed for preliminary review shortly.
ASP OUTPUT BEAM TUBE
The larger diameter output beam tube with 12 pairs of viewports should be used between HAM4 and HAM5 in ADLIGO because the additional viewports are needed for the optical levers.
BSC LAYOUT
Chris added the SEI support structure and optics table to the
SW BSC
layout. Luke created a model of the ETM SUS and ETM Tel SUS that alows the max/min position of the ETM in the BSC to be determined.
CIT Optics & Mechanics
from Dennis Coyne
- Most of the group’s efforts are reported under the Advanced LIGO project.
- SolidWorks and PDMWorks Upgrade: LIGO/MIT (Ken Mason and students) will make the transition to SW 2006 (including PDMWorks) now (or soon) to enable compatibility with the HAM-SEI-ISI contractor. The rest of us will stick with SW 2005, SP3 until Mike & Larry have checked compatibility with the PDMWorks vault and are ready to make the transition across the entire LSC, on or about 11/13. Please let me know if you think this is a problem. We will make an announcement to all SolidWorks users before making the transition. As a reminder, we are using the research version of SOlidWorks, not the educational version.
Control and Data Systems
From: Rolf Bork rolf@ligo.caltech.edu
- /ISI/
- Rich and Mohana are working to complete the ISI coil-driver
design. Focus is on thermal management and packaging. The electrical
design is complete and will meet the needs of both the fine, and coarse
actuators with a single design. Still in the process of determining the
correct specs for the monitoring and thermal-shutdown portion of the design.
- /ISC/
- Rich is working on the evaluation of various RFPD topologies
for AdLIGO. Also, started to get the equipment setup in the 40m lab for
testing diodes.
- The new GS-13 boards have arrived from PCB Express, and they
are being stuffed with pins and attached to the 26" cables that were
made in the back shop last week.
For additional information about this report, contact Albert Lazzarini or Phil Lindquist